openwrt/package/kernel/mac80211/patches/brcm/998-survey.patch

--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -2910,6 +2910,63 @@ done:
 }
 
 static int
+brcmf_cfg80211_dump_survey(struct wiphy *wiphy, struct net_device *ndev,
+			   int idx, struct survey_info *survey)
+{
+	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
+	struct brcmf_if *ifp = netdev_priv(ndev);
+	struct brcmu_chan ch;
+	enum nl80211_band band = 0;
+	s32 err = 0;
+	int noise;
+	u32 freq;
+	u32 chanspec;
+
+	memset(survey, 0, sizeof(struct survey_info));
+	if (idx != 0) {
+		if (idx >= cfg->pub->num_chan_stats || cfg->pub->chan_stats == NULL)
+			return -ENOENT;
+		if (cfg->pub->chan_stats[idx].freq == 0)
+			return -ENOENT;
+		survey->filled = SURVEY_INFO_NOISE_DBM;
+		survey->channel = ieee80211_get_channel(wiphy, cfg->pub->chan_stats[idx].freq);
+		survey->noise = cfg->pub->chan_stats[idx].noise;
+		return 0;
+	}
+
+	err = brcmf_fil_iovar_int_get(ifp, "chanspec", &chanspec);
+	if (err) {
+		brcmf_err("chanspec failed (%d)\n", err);
+		return err;
+	}
+
+	ch.chspec = chanspec;
+	cfg->d11inf.decchspec(&ch);
+
+	switch (ch.band) {
+	case BRCMU_CHAN_BAND_2G:
+		band = NL80211_BAND_2GHZ;
+		break;
+	case BRCMU_CHAN_BAND_5G:
+		band = NL80211_BAND_5GHZ;
+		break;
+	}
+
+	freq = ieee80211_channel_to_frequency(ch.control_ch_num, band);
+	survey->channel = ieee80211_get_channel(wiphy, freq);
+
+	err = brcmf_fil_cmd_int_get(ifp, BRCMF_C_GET_PHY_NOISE, &noise);
+	if (err) {
+		brcmf_err("Could not get noise (%d)\n", err);
+		return err;
+	}
+
+	survey->filled = SURVEY_INFO_NOISE_DBM | SURVEY_INFO_IN_USE;
+	survey->noise = le32_to_cpu(noise);
+	return 0;
+}
+
+static int
 brcmf_cfg80211_dump_station(struct wiphy *wiphy, struct net_device *ndev,
 			    int idx, u8 *mac, struct station_info *sinfo)
 {
@@ -3005,6 +3062,7 @@ static s32 brcmf_inform_single_bss(struc
 	struct brcmu_chan ch;
 	u16 channel;
 	u32 freq;
+	int i;
 	u16 notify_capability;
 	u16 notify_interval;
 	u8 *notify_ie;
@@ -3029,6 +3087,17 @@ static s32 brcmf_inform_single_bss(struc
 		band = NL80211_BAND_5GHZ;
 
 	freq = ieee80211_channel_to_frequency(channel, band);
+	for (i = 0;i < cfg->pub->num_chan_stats;i++) {
+		if (freq == cfg->pub->chan_stats[i].freq)
+			break;
+		if (cfg->pub->chan_stats[i].freq == 0)
+			break;
+	}
+	if (i < cfg->pub->num_chan_stats) {
+		cfg->pub->chan_stats[i].freq = freq;
+		cfg->pub->chan_stats[i].noise = bi->phy_noise;
+	}
+
 	bss_data.chan = ieee80211_get_channel(wiphy, freq);
 	bss_data.scan_width = NL80211_BSS_CHAN_WIDTH_20;
 	bss_data.boottime_ns = ktime_to_ns(ktime_get_boottime());
@@ -5515,6 +5584,7 @@ static struct cfg80211_ops brcmf_cfg8021
 	.leave_ibss = brcmf_cfg80211_leave_ibss,
 	.get_station = brcmf_cfg80211_get_station,
 	.dump_station = brcmf_cfg80211_dump_station,
+	.dump_survey = brcmf_cfg80211_dump_survey,
 	.set_tx_power = brcmf_cfg80211_set_tx_power,
 	.get_tx_power = brcmf_cfg80211_get_tx_power,
 	.add_key = brcmf_cfg80211_add_key,
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
@@ -1356,6 +1356,8 @@ int brcmf_attach(struct device *dev)
 
 	/* Link to bus module */
 	drvr->hdrlen = 0;
+	drvr->chan_stats = vzalloc(256 * sizeof(struct brcmf_chan_stats));
+	drvr->num_chan_stats = 256;
 
 	/* Attach and link in the protocol */
 	ret = brcmf_proto_attach(drvr);
@@ -1438,6 +1440,12 @@ void brcmf_detach(struct device *dev)
 	if (drvr == NULL)
 		return;
 
+	drvr->num_chan_stats = 0;
+	if (drvr->chan_stats) {
+		vfree(drvr->chan_stats);
+		drvr->chan_stats = NULL;
+	}
+
 #ifdef CONFIG_INET
 	unregister_inetaddr_notifier(&drvr->inetaddr_notifier);
 #endif
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.h
@@ -91,6 +91,11 @@ struct brcmf_rev_info {
 	u32 nvramrev;
 };
 
+struct brcmf_chan_stats {
+	u32 freq;
+	int noise;
+};
+
 /* Common structure for module and instance linkage */
 struct brcmf_pub {
 	/* Linkage ponters */
@@ -100,6 +105,9 @@ struct brcmf_pub {
 	struct cfg80211_ops *ops;
 	struct brcmf_cfg80211_info *config;
 
+	int num_chan_stats;
+	struct brcmf_chan_stats *chan_stats;
+
 	/* Internal brcmf items */
 	uint hdrlen;		/* Total BRCMF header length (proto + bus) */